Investigating P0446 on Your 2022 Volvo S60
A P0446 code on your 2022 Volvo S60 indicates an EVAP vent control circuit malfunction. The S60 uses the SPA platform with B5 mild-hybrid or T8 PHEV powertrains (Polestar Engineered uses T8). Volvo uses a tank seal valve (vent valve) and purge valve for EVAP control.
The Volvo basic warranty (4yr/50k) may still be active. Check your purchase date and mileage.
Clues and Symptoms
- Check engine light with P0446
- Fuel fill difficulty
- EVAP readiness monitor incomplete
- T8 PHEV: monitors run less frequently
Top Suspects
- Tank Seal Valve Failure (High Likelihood): Volvo's vent valve can fail. Replacement costs $150–$280.
- Purge Valve Malfunction (High Likelihood): Sticking purge valve disrupts EVAP flow. Replacement runs $130–$240.
- Tank Seal Valve Wiring (Medium Likelihood): Connector corrosion or damage. Repair costs $80–$180.
- EVAP Hose Deterioration (Medium Likelihood): Hose cracks or connections. Repair runs $60–$150.
- Gas Cap Seal (Low Likelihood): Worn seal. Replacement is $15–$30.
How to Investigate
VIDA diagnostics at a Volvo dealer provide the most accurate testing. Check the gas cap first for a quick DIY check.
Warranty and Cost
The basic warranty (4yr/50k) may still apply. Federal emissions warranty (8yr/80k) covers EVAP through 2030. Out of warranty: $130–$280.
Safe to Drive?
Yes. P0446 doesn't affect your S60's engine, hybrid system, or sport-driving dynamics.